Heater for feed-water.



No. 779,122. PATENTED JAN. 3, 1905.

R. H. FRASER.

HEATER FOR FEED WATER.

APPLICATION FILED MAR. 28, 1904.

yf aiesses:

UNTTnn STATES Patented January 3, 1905.

HEATER FOR FEED-WATER.

SPECIFICATION forming part of Letters Patent No. 779,122, dated January 3, 1905.

Application filed March 28, 1904. Serial No. 200,308-

To ctZZ whom, it rncty concern.-

Be it known that I, ROBERT H. FRASER, of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Heaters for Feedl/Vater, of which the following is a specification.

This invention relates to means for transmitting heat from one fluid to another, and it has particular reference to that type of devices known as feed-water heaters, although the invention is not limited to such use.

The object of this invention is to provide an improved structure of devices for heating feedwater, although the said structure is equally Well adapted for use as a reheater or superheater or, in fact, for employment generally when heat is to be transmitted from one fluid to another in any desired location.

The particular object of the invention is to provide a structure in which the heat will be equally distributed. Further particular objects of the invention will be hereinafter pointed out.

The invention consists in the construction and arrangement of parts, substantially as hereinafter described and claimed.

Of the accompanying drawings, forming a part of this specification, Figure 1 is a vertical elevation, partly in section, representing an embodiment of my invention. Fig. 2 represents a section on line 2 2 of Fig. 1.

A suitable casing 10 is provided with atop 11 and a bottom or floor 12; but of course it is to be understood that if the entire device were arranged in horizontal position instead of vertical then the parts which I have termed the top and the bottom or floor would become the ends of the apparatus. In the present description I shall refer to the arrangement of parts as shown in the drawings. Alower horizontal partition is represented at 13 and an upper horizontal partition at 14, the space within the casing 10 above said partition 14: being hereinafter referred to as the chamber 2.

Vertical partitions 15 divide the space between the bottom 12 and the partition 13 into chambers 00, and vertical partitions 16 between the partitions l3 and 1d divide the space between them into chambers y. The partitions 16 are not in line with the partitions 15, but are practically alternate therewith in their lateral positions, for a reason which will be presently described.

Secured to the partition 14 are the tubes 17, which I term outer tubes, these said tubes 17 having closed upper ends and communicating at their lower ends with the chambers 1 As will be seen in Fig. 2, the tubes are arranged in rows, there being two rows com-' municating with each chambery. Secured to the partition 13 are inner tubes 18, which extend up within the tube 17 and have open upper ends. These tubes are so arranged that two rows of them connect with each lower chamber As clearly illustrated in Fig. 1, one row of tubes 18 extends down on one side of each partition 16, while the other row of tubes 18, which connects with the same lower chamber 50, passes down on the opposite side of said partition 16.

19 represents the inlet to the first chamber 00, and 20 the outlet from the last chamber a2, these passage-ways being for the heating medium, such as steam.

21 represents an inlet to the chamber .2, and 22 an outlet from said chamber .2 for the medium to be heated, such as water, if the device is employed as a feed-water heater.

Describing the operation as for heating feedwater, it is to be supposed that steam enters at the inlet19 to the first chamber :1; and passes up through the first row of inner tubes 18 and then down through the annular spaces between the inner tubes and the outer tubes 17 of the said row into the lirst chamber y and then upward through the annular spaces between the outer and inner tubes of the second row and then down through the inner tubes of said second row into the second chamber :12, the steam passing on through the entire apparatus in the same manner as so far described and finally escaping at 20. The medium to be heated is passed into and through the chamber .2 by means of the inlet and outlet 21 and 22, respectively. Steam can more readily than water pass rapidly and equally through the annular spaces, owing to the relative elasticity of steam. Furthermore, with this structure the fluid to be heated can be retained in the casing as long as required to enable it to be heated to any desired degree, said fluid being contained in said casing in quite a large quantity. This could not be done if it were necessary to send the fluid to be heated through the annular spaces, for the reason that the fluid must then necessarily travel and could not remain stationary in order to transmit a large amount of heat thereto.

In order to permit of the escape or removal of water of condensation, the alternating chambers m and y will in practice be provided with any suitable or preferred outlets whereby the chambers might be drained into a steam-trap.

I have referred to steam as the heating medium and water as the fluid to be heated; but it is obvious that the device may be employed for transmitting heat from any fluid to another. For instance, if products of combustion were passed through the casing instead of water the steam in the tubes would be superheated.

I claim 1. A device of the character specified, comprising an upper casing, a plurality of rows of inner and outer tubes contained in said casing, a horizontal partition extending across the lower end of the casing and having the outer tubes connected therewith, vertical partitions extending downward from said horizontal partition, a bottom having vertical partitions extending upward therefrom and alternating with the vertical partitions depending from the first-mentioned horizontal partition,

a horizontal intermediate partition extending between and separate from and resting against the edges of the alternating series of vertical partitions, the lower ends of the inner tubes extending through said intermediate partitions, means for supplying one fluid to the inner tubes and to the annular spaces between the inner and outer tubes and to the alternating chambers between the vertical partitions, and means for supplying another fluid to the space within the casing around said outer tubes, the connections being such that two rows of tubes connect with each of said alternating chambers.

2. A heater havingacasing formed with two compartments at one end, said two compartments being subdivided by transverse alternating continuous or unbroken partitions, a plurality of rows of inner and outer tubes in the casing, the inner tubes connecting in pairs with one set of alternating chambers and the outer tubes connecting in pairs with the other set of alternating chambers, means being provided for circulating a heating medium. inside of the inner tubes and through the, annular spaces between the inner tubes and outer tubes, and means for supplying fluid to be heated outside of the outer tubes.

In testimony whereof I have aflixed my signature in presence of two witnesses.

ROBERT H. FRASER.

NVitnesses:

A. W. HARRISON, E. BATOHELDER, 

